/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  /* Colors - Light Mode */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-secondary: #0f766e;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-body: #334155;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-error: #dc2626;

  /* Skill badge colors */
  --badge-lang-bg: #dbeafe;
  --badge-lang-text: #1e40af;
  --badge-platform-bg: #d1fae5;
  --badge-platform-text: #065f46;
  --badge-technical-bg: #ede9fe;
  --badge-technical-text: #5b21b6;
  --badge-network-bg: #fff7ed;
  --badge-network-text: #9a3412;

  /* Typography */
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'Fira Code', monospace;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 64rem;
  --side-padding: 1.5rem;
  --section-padding: 4rem;

  /* Diagram colors */
  --diagram-primary-dim: rgba(37, 99, 235, 0.08);
  --diagram-secondary-dim: rgba(15, 118, 110, 0.08);
  --diagram-amber: #b45309;
  --diagram-amber-dim: rgba(180, 83, 9, 0.08);
  --diagram-amber-solid: rgba(180, 83, 9, 0.2);
  --diagram-red: #dc2626;
  --diagram-red-dim: rgba(220, 38, 38, 0.08);
  --diagram-purple: #7c3aed;
  --diagram-line: #cbd5e1;
  --diagram-surface-alt: #f8fafc;

  /* Misc */
  --radius: 0.75rem;
  --radius-sm: 0.5rem;
  --shadow-sm: 0 1px 3px rgb(0 0 0 / 0.06);
  --shadow-md: 0 4px 16px rgb(0 0 0 / 0.08);
  --shadow-lg: 0 8px 32px rgb(0 0 0 / 0.1);
  --nav-height: 4rem;
}

/* Dark Mode */
[data-theme="dark"] {
  --color-primary: #60a5fa;
  --color-primary-hover: #93bbfd;
  --color-primary-light: #1e3a5f;
  --color-secondary: #2dd4bf;
  --color-bg: #0f172a;
  --color-bg-alt: #1e293b;
  --color-surface: #1e293b;
  --color-text: #f1f5f9;
  --color-text-body: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-border: #334155;

  --badge-lang-bg: #1e3a5f;
  --badge-lang-text: #93c5fd;
  --badge-platform-bg: #064e3b;
  --badge-platform-text: #6ee7b7;
  --badge-technical-bg: #2e1065;
  --badge-technical-text: #c4b5fd;
  --badge-network-bg: #431407;
  --badge-network-text: #fdba74;

  --diagram-primary-dim: rgba(96, 165, 250, 0.15);
  --diagram-secondary-dim: rgba(45, 212, 191, 0.12);
  --diagram-amber: #fbbf24;
  --diagram-amber-dim: rgba(251, 191, 36, 0.12);
  --diagram-amber-solid: rgba(251, 191, 36, 0.35);
  --diagram-red: #f87171;
  --diagram-red-dim: rgba(248, 113, 113, 0.12);
  --diagram-purple: #a78bfa;
  --diagram-line: #475569;
  --diagram-surface-alt: #253349;

  --shadow-sm: 0 1px 3px rgb(0 0 0 / 0.2);
  --shadow-md: 0 4px 16px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 8px 32px rgb(0 0 0 / 0.4);
}

/* ===========================
   Reset
   =========================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-body);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-hover);
}

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
  color: inherit;
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===========================
   Theme transition
   =========================== */
body.theme-transition,
body.theme-transition *,
body.theme-transition *::before,
body.theme-transition *::after {
  transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* ===========================
   Skip to content
   =========================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-4);
  color: #fff;
}

[data-theme="dark"] .skip-link {
  background: #2563eb;
}

/* ===========================
   Layout
   =========================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--side-padding);
}

.section {
  padding: var(--section-padding) 0;
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section__title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.section__subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 40rem;
  margin: 0 auto;
}

/* ===========================
   Header / Navigation
   =========================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: rgb(255 255 255 / 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .header {
  background: rgb(15 23 42 / 0.8);
}

.header--scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--side-padding);
}

.header__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.header__nav {
  display: none;
  gap: var(--space-8);
}

.header__nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
  position: relative;
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-primary);
}

.header__nav-link--active::after {
  content: '';
  position: absolute;
  bottom: -0.25rem;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme toggle */
.theme-toggle {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.theme-toggle:hover {
  color: var(--color-text);
  background-color: var(--color-bg-alt);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.theme-toggle .icon-moon,
[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

/* Mobile hamburger */
.mobile-menu-btn {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

.mobile-menu-btn:hover {
  color: var(--color-text);
}

.mobile-menu-btn svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-8) var(--side-padding);
}

.mobile-nav--open {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-nav__link {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__link:hover {
  color: var(--color-primary);
}

/* Desktop nav visible */
@media (min-width: 1024px) {
  .header__nav {
    display: flex;
  }

  .mobile-menu-btn {
    display: none;
  }
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--nav-height) var(--side-padding) var(--space-16);
  position: relative;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background:
    radial-gradient(circle at 20% 50%, var(--color-primary) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, var(--color-secondary) 0%, transparent 50%);
  animation: heroBgShift 12s ease-in-out infinite alternate;
}

@keyframes heroBgShift {
  0% { transform: scale(1) translateY(0); }
  100% { transform: scale(1.1) translateY(-2%); }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 42rem;
}

.hero__heading {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25em;
}

.hero__first-name {
  font-weight: 400;
  font-size: 0.6em;
  color: #4b5e78;
}

[data-theme="dark"] .hero__first-name {
  color: var(--color-text-muted);
}

.hero__subheading {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.hero__tagline {
  font-size: 1.125rem;
  color: #4b5e78;
  margin-bottom: var(--space-6);
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

[data-theme="dark"] .hero__tagline {
  color: var(--color-text-muted);
}


.hero__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 639px) {
  .hero__heading {
    font-size: 2.25rem;
  }
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

[data-theme="dark"] .btn--primary {
  background: #2563eb;
}

[data-theme="dark"] .btn--primary:hover {
  background: #1d4ed8;
}

.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

[data-theme="dark"] .btn--outline:hover {
  background: #2563eb;
}

.btn--sm {
  font-size: 0.875rem;
  padding: var(--space-2) var(--space-4);
}

/* ===========================
   About Section
   =========================== */
.about__grid {
  display: grid;
  gap: var(--space-12);
}

.about__text p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-body);
}

.about__highlights {
  display: grid;
  gap: var(--space-6);
}

.highlight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-6);
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.highlight-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.highlight-card__value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.highlight-card__label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

@media (min-width: 640px) {
  .about__highlights {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .about__highlights {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Skills Section
   =========================== */
.skills__grid {
  display: grid;
  gap: var(--space-6);
}

.skill-card--lang { --card-accent: #2563eb; }
.skill-card--network { --card-accent: #c2410c; }
.skill-card--platform { --card-accent: #047857; }
.skill-card--dev { --card-accent: #7c3aed; }

[data-theme="dark"] .skill-card--lang { --card-accent: #60a5fa; }
[data-theme="dark"] .skill-card--network { --card-accent: #fb923c; }
[data-theme="dark"] .skill-card--platform { --card-accent: #34d399; }
[data-theme="dark"] .skill-card--dev { --card-accent: #a78bfa; }

.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--card-accent);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.skill-card__header {
  padding: var(--space-2) var(--space-6);
  font-weight: 700;
  font-size: 0.6875rem;
  color: var(--card-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-card__body {
  padding: 0 var(--space-6) var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: var(--space-1) var(--space-3);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.badge__icon {
  width: 0.875rem;
  height: 0.875rem;
  flex-shrink: 0;
}

.badge--lang {
  background: var(--badge-lang-bg);
  color: var(--badge-lang-text);
}

.badge--platform {
  background: var(--badge-platform-bg);
  color: var(--badge-platform-text);
}

.badge--dev {
  background: var(--badge-technical-bg);
  color: var(--badge-technical-text);
}

.badge--network {
  background: var(--badge-network-bg);
  color: var(--badge-network-text);
}

@media (min-width: 640px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===========================
   Projects Section
   =========================== */
.projects__grid {
  display: grid;
  gap: var(--space-6);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.project-card__name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.project-card__name svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.project-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  flex: 1;
  line-height: 1.5;
}

.project-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.project-card__lang {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.project-card__lang-dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.project-card__stat {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.project-card__stat svg {
  width: 0.875rem;
  height: 0.875rem;
}

.projects__footer {
  text-align: center;
  margin-top: var(--space-8);
}

.projects__link {
  font-weight: 600;
  font-size: 1rem;
}

/* Skeleton loading */
.skeleton-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-6);
}

.skeleton-line {
  height: 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-border);
  animation: pulse 1.5s ease-in-out infinite;
}

.skeleton-line--title {
  width: 60%;
  height: 1.25rem;
  margin-bottom: var(--space-4);
}

.skeleton-line--text {
  width: 100%;
  margin-bottom: var(--space-2);
}

.skeleton-line--short {
  width: 40%;
  margin-top: var(--space-4);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Error state */
.projects__error {
  text-align: center;
  padding: var(--space-8);
  color: var(--color-text-muted);
}

.projects__error p {
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Featured Projects */
.featured-projects {
  margin-bottom: var(--space-8);
}

.featured-projects__label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.featured-projects__grid {
  display: grid;
  gap: var(--space-6);
}

.featured-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius);
  padding: var(--space-6);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.featured-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.featured-card__name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.featured-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-4);
}

.featured-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.featured-card__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--badge-network-bg);
  color: var(--badge-network-text);
}

a.featured-card--link {
  display: block;
  color: inherit;
  text-decoration: none;
}

@media (min-width: 640px) {
  .featured-projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .featured-projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===========================
   Experience Section (Timeline)
   =========================== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -2rem;
  top: 0.25rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
  transform: translateX(0);
}

.timeline__content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-6);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.timeline__content:hover {
  box-shadow: var(--shadow-md);
}

.timeline__role {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

.timeline__company {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.timeline__meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.timeline__bullets {
  list-style: disc;
  padding-left: 1.25rem;
}

.timeline__bullets li {
  font-size: 0.9375rem;
  color: var(--color-text-body);
  margin-bottom: var(--space-2);
  line-height: 1.5;
}

.timeline__bullets li:last-child {
  margin-bottom: 0;
}

.timeline__toggle {
  margin-top: var(--space-8);
  text-align: center;
}

.timeline__toggle-btn {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.timeline__toggle-btn:hover {
  color: var(--color-primary-hover);
}

.timeline__toggle-btn svg {
  width: 1rem;
  height: 1rem;
  transition: transform 0.2s ease;
}

.timeline__toggle-btn--open svg {
  transform: rotate(180deg);
}

.timeline__item--secondary {
  display: none;
}

.timeline--show-all .timeline__item--secondary {
  display: block;
}

/* ===========================
   Per-role bullet progressive disclosure
   =========================== */
.timeline__bullets[data-show="2"] li:nth-child(n+3) {
  display: none;
}

.timeline__bullets[data-show="3"] li:nth-child(n+4) {
  display: none;
}

.timeline__content--expanded .timeline__bullets[data-show] li {
  display: list-item;
}

.timeline__show-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-2);
  padding: 0;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  transition: color 0.2s ease;
}

.timeline__show-more:hover {
  color: var(--color-primary-hover);
}

.timeline__show-more svg {
  width: 0.875rem;
  height: 0.875rem;
  transition: transform 0.2s ease;
}

.timeline__show-more--open svg {
  transform: rotate(180deg);
}

/* ===========================
   Education & Awards Section (Compact Credentials)
   =========================== */
.section--compact {
  padding: var(--space-8) 0;
}

.section__title--compact {
  font-size: 1.25rem;
  margin-bottom: var(--space-6);
}

.credentials {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.credentials__school {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.credentials__degree {
  font-size: 0.9375rem;
  color: var(--color-text-body);
}

.credentials__status {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.credentials__awards {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.credentials__award {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.credentials__award svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  color: var(--color-primary);
}

.credentials__award-text {
  font-size: 0.875rem;
  color: var(--color-text-body);
}

.credentials__award-date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-left: var(--space-1);
}

@media (min-width: 1024px) {
  .credentials {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

/* ===========================
   Contact Section
   =========================== */
.contact__wrapper {
  max-width: 32rem;
  margin: 0 auto;
  text-align: center;
}

.contact__subtitle {
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

.form {
  text-align: left;
}

.form__group {
  margin-bottom: var(--space-6);
}

.form__label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form__input,
.form__textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-body);
  font: inherit;
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.15);
}

[data-theme="dark"] .form__input:focus,
[data-theme="dark"] .form__textarea:focus {
  box-shadow: 0 0 0 3px rgb(96 165 250 / 0.2);
}

.form__textarea {
  resize: vertical;
  min-height: 8rem;
}

/* Honeypot */
.form__hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form__submit {
  width: 100%;
}

.form__status {
  margin-top: var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
}

.form__status--success {
  color: var(--color-success);
}

.form__status--error {
  color: var(--color-error);
}

.contact__socials {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.contact__social-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.contact__social-link:hover {
  color: var(--color-primary);
}

.contact__social-link svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ===========================
   Footer
   =========================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

.footer__copy {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.footer__link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__link:hover {
  color: var(--color-primary);
}

.footer__socials {
  display: flex;
  gap: var(--space-4);
}

.footer__social {
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

.footer__social:hover {
  color: var(--color-primary);
}

.footer__social svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ===========================
   Case Study / Project Detail
   =========================== */
.case-study {
  max-width: 48rem;
  margin: 0 auto;
  padding: calc(var(--nav-height) + var(--space-12)) var(--side-padding) var(--space-16);
}

.case-study__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  transition: color 0.2s ease;
}

.case-study__back:hover {
  color: var(--color-primary);
}

.case-study__back svg {
  width: 1rem;
  height: 1rem;
}

.case-study__title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.case-study__lede {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.case-study__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-12);
}

.case-study__body h2 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

.case-study__body h2:first-child {
  margin-top: 0;
}

.case-study__body p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-body);
  margin-bottom: var(--space-4);
}

.case-study__body ul {
  list-style: disc;
  padding-left: 1.25rem;
  margin-bottom: var(--space-4);
}

.case-study__body li {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-body);
  margin-bottom: var(--space-2);
}

.case-study__body li:last-child {
  margin-bottom: 0;
}

.case-study__body li strong {
  color: var(--color-text);
}

.case-study__body pre {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-6);
  overflow-x: auto;
  margin-bottom: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-text-body);
}

[data-theme="dark"] .case-study__body pre {
  background: #131c2e;
}

.case-study__diagram {
  margin: var(--space-8) calc(-1 * var(--space-4));
}

.case-study__diagram img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.case-study__diagram figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-2);
}

.case-study__diagram .diagram-dark {
  display: none;
}

[data-theme="dark"] .case-study__diagram .diagram-dark {
  display: block;
}

[data-theme="dark"] .case-study__diagram .diagram-light {
  display: none;
}

@media (min-width: 640px) {
  .case-study__diagram {
    margin-left: calc(-1 * var(--space-8));
    margin-right: calc(-1 * var(--space-8));
  }

  .case-study__title {
    font-size: 2.25rem;
  }
}

/* ===========================
   Scroll Reveal Animation
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal--visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__bg {
    animation: none;
  }

  .skeleton-line {
    animation: none;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0s !important;
    animation-duration: 0s !important;
  }
}